Sewage-tank for the purification of sewage.



Y 'by E. SEUBERT. SBWAGE TANK FOB. THE PURIFIGATION 0F SEWAGE.

APPLICATION FILED NOV. 11, 1912. 1,1 02,553.

Patented July 7, 1914.

2 SHEETS-SHEET 1.

Ill

y lestf lventor: l 6 M I Atty E. SEUBERT. SEWAGE TANK FOR THE PURIFIGATION OF SEWAGE. APPLIOATION FILED 11611.11, 1912. 1,102,553. Patented July 7, 1914 2 SHEETS-SHEET 2.

In Ven tor:

4A Atty EUGEN sEUBnn'r, or MUNICH, GERMANY.

SEWAGE-TANK FR THE PURIFICAT'ION 0F SEWAGE.

incassa.

Specification of Letters Patent.

Patented July a, 1914.

applicatiniied Nuvember 11, 191s.` serial No. 730,777.

My invention relates to apparatus for me.

chanically treating sewage to purify the same prior to its discharge into streams or other points of discharge.

One object of the invention is to provide a compactly constructed apparatus by means of which large quantities of sewage may be efficiently purified within a relatively short Spacel of time.

Another object is to provide simply constructed means for recovering valuable constituents, such as fatty products, from the sewage as the same is being treated in the course of purification.

In its preferred embodiment, an apparatus constructed in accordance with my invention includes a central receiving chamber in communication with'a continuous spirall course or way, a sediment chamber lying under the 'receiving chamber and the spiral courseand a cover over the sediment chamber', which cover forms an inclined floor down'which the sediment, freed from the sewage, glides into the sediment chamber. The apparatus also includes certain important details of structure, all of which will be fully hereinafter described: f

' The invention is illustratively exemplified in the accompanying drawings, wherein,-

' Figure 1 1s a horizontal sectional view,

on the line 1-1 of Fig. 2, of a single unit purifying lapparatus; Fig. 2 is a vertical sectional view on the line 2-2 of Fig. 1; Fig. 3 is a horizontal sectional view, on the line '3-3 of Fig. 4, of a multiple unit purifying apparatus; Fig. 4 isa vert1c`al sectional v1ew on the line 4-4 of Fig. 3; Fig. 5 isr a transverse sectional View on the line 5-5 of Fig.

3; Fig. 6 isa fragmentary sectional view of the cover over the sediment chamber; Fig. 7

is a horizontal sectional View, on the line fil-7 of Fig. 8; of a modied form of the invention containing means for the recovery of ,fatty substances and like valuable products;

Fig. 8 is a vertical sectional view on the line 8 8 of Fig. 7, and Fig. 9 is a sectional detail view on the line 9 9 of Fig. 8.

In all forms of the invention, the sewage to be treated is first fed toa central receiving chamber whence it passes in a contnuous spiral course to the outlet, which it reaches in practically pure condition, i. e. freed of sediment, fats, and other solid substances. The forms of invention illustrated all disclose a continuous forwardly extending spiral course, but it is to be understood that this form is illustrative merely, and that the course may be serpentine or of other tortuous form, rovided that a long course within a relatively small area -is provided.

Referring in detail to the drawing,and particularly to Figs. 1 and 2 thereof, 10 denotes an upright casing substantially cylindrical at its upper portion. Intermediate its upper and lower ends, the casing is formed with the converging walls 10a, merging into the lower walls 1()b between which the sediment chamber 11 is contained. Supported.

with the platform 12 and the converging v wallsw10, are convolute partitions 122.12, 12b, which in practice are preferably formed as a continuous Wall, and between the convolutions of which passages13, 13a, 13", of spiral formation, are provided. The outermost passage 13b leads through a contact filter 14 t0 the emission passage or tube 15. It is desirable to provide slots or orifices through which the sediment which is precipitated from the sewage may pass into'the sediment chamber 11. In certain forms of the invention such slots are provided only at the points where the ends of the Walls 12F are iny proximity to the Walls 10, the lower' ends of the partitions 12, 12a', 12", being slotted to allow the sediment to pass therethrough, While in other forms of the invention, e. guth'at shown in Fig. 4, I may pro- 110 2 shows a form of device wherein the walls ment issues into chamber 11.

12 are slottedonly at points adjacent the walls 10a, while the lower ends of the verticalpartitions 12', 12, 12", are slotted at 19 to allowi the sediment to glide down the inclined Walls 12, and pass through the slots in the walls 12 into the chamber 11. The preferred manner of anchoring the platform 12 to the walls 10a consists in embedding iron girders or 'pedestals 16 in the walls 10*- (which are preferably of concrete or other suitablemasonry) 4and securing to the lower edges of the walls 12 angle iron bars 17 which are suitably bolted to the girders 16. The continuity of the girders 16 is interrupted at suitable intervals to provide between the same and the angle irons 17 annular spaces or slots 18 through which the sedi- It will be noted that the slots 18 are spaced away from the upper ends of the walls 10b a sufficient distance to prevent any sediment which may rise in the chamber 1-1 from entering and choking these slots.

In Figs. 4, 5 and 6 the walls 12 are shown as being provided with a plurality of series of slots 17 and extending adjacent each of these series of slots is an'an le bar 17 having a depending edgev or ange 17fl projecting toward the chamber 11, and which flanges 17 a serve to deflect the sediment into this chamber. The sewage is admitted to the apparatus through an inlet conduit or' pipe 20, the inner end of4 which opens into the central sewage receiving chamber 21'. This receiving chamber'is-lsubstantially of annular shape and is Minclosed by "thevconvolutions of the vertical walls or partitions 12', 12, and 12b between which the spiral course for the sewage is formed. The receiving chamber 21 is provided with' awide outlet22, extending vertically beyond the .normal water lever. The outlet 22 is preferably formed of vertical rods or bars which act as a trap lto hold back solid particles in the sewage. From the outlet 22 the sewage enters and passes through thc spiral course, a continuous horizontal' centrifugal' action being assured by the constant supply of sewage flowing to the receiving chamber 21 'through the inlet pipe 20. Gases are given olf Y from the sediment which ultimately reaches the sediment :chamber I11, and to provide for the escape" of such gases I employone or more vent pipes 23, open at both ends, the lower end communicating with the interior of chamber 11 and the upper end opening into atmosphere.

The structural features of the multiple unit settling tank shown-in Figs. 3, 4 and 5 substantially correspond with those of the? single unit device of` Figs. 1 and 2. In the multiple unit structure the course is an elliptical spiral, the sewage entering through a common inlet 20a and then passing by way ofthe branch-pipes 20h to the receiving chamber 21a. From each receiving chamber 21*1 the sewage flows through the outlet 22a vinto the elliptical spiral course 23, 24, 25 and out throughthe common fied structure, which is employedwhen it is l desired .to recover'fatty constituents fromv In these vfigures the structure j the sewage. and shape of the exterior casing, the platform Walls, 'the central receiving chamber andthe inlet for the. sewage `are the samel as shown in'Figs. 1- and 2, and the descri tion thereof does not require repetition. T e structure of the central receiving chamber,

of the spiral courses around the same,'and of y 8 and 9 and will--no'w be described.-l l Extending from a4 point near-the upper end of each of the platform walls 12b, to the the outlet is somewhat modied in Figs. 7,

bottom of the outermost of the walls between which the spiral course` is formed, concentric with the upper part of the casing of the tank, isa supportlng 'wall 41 thesel walls converging" at their .lower ends and -each being inclined from the platform walls 12F at an angle of approximately fortysfve degrees. `Upon the. supporting .walls 41 rest the vertical partitions between which the spiral course or raceway for the sewage is formed. The walls 41 are-perforated 'or `slottd 'at 42, and mounted thereon-'are the vertical convolute partitions '43, 44, 45, at the center of whichthe receiving chamber 4'6 is provided and between theconvolutions of the others of which the sewage travels in a spiral path. Between the outer periphery of'the partition 45 and the' inner-periphery fof a wall 40 carried interiorlyby and paral- 1 lel to the casing of the device an annular fat collecting channel 47 is formed, which channel is open at both its upper and lower ends. Throughout the greater portion of its lengththe height of the wall'. 40 is less than that of the` partitions 43,l 44 and 45, but "i that portion of the wall 40 which ie's betweenthe inclined wall. sections 45L and 4517 which guide the water to the outlet, isfequal in height to these partitions. J K'Ihe'purpose i I of'y this constructiony is to have-the higher 130 portion of the wall 40 prevent the discharge of the fatty substances fiowing on top of the water. Near its lower end or edge the higher part of the annular wall 40 is provided with an outlet opening 49 ata slightly lower lever than the upper surface of the outlet 50 of the entire settling tank. Surrounding the fat collecting channel 47 is the annular fat receiving chamber 47a. Below the walls 41 is formed an intermediate chamber 51, saidintermediate chamber being bounded by the walls 41 and 12b, and depending into the intermediate chamber \from the lower surfaces of the walls 41 is a swinging grid consisting of a plurality of spaced, pivotally supported rods or I bars 51a, the lower ends of which are spaced somewhat from the lower ends of the platform walls 12b.

In the form of invention shown in Figs. 7, 8, and 9 the operation is vas follows The sewage passes through theinlet pipe or coni duit to the central receiving chamber 46 and as in the other forms of invention, is forced to ow centrifugally in a horizontal spiral path through the several courses of the raceway. The process of separating out the grease and sediment from the liquid portion of the sewage proceeds simultaneously in two directions. r1`he process commences in the receiving chamber 46, out of which a part of the sediment passes through the openings 41a in the walls 12b and into the chamber 51. As'the sewage passes out of the chamber 46 into the spiral course between the vertical partitions, the grease being specifically the lightest 'portion floats on top,

and the sediment passes through the oriiices 42 into the chamber 51. The Huid with the grease floating on its surface is driven forward by the constant inow to the chamber 46, and ultimately the grease enters the grease collecting channel 47 and passes thence into the receiving chamber 47l by owing over the upper edge of thek lower part of the wall 40 into this chamber. The sediment entering the chamber both from the receiving chamber 46 and from the spiral` course is retarded y the swinging grid 51, The water flowing against this grid causes it to swing or oscillate, by which action it presses and agitates the sediment behind it. The sediment thus gives up its grease constituent which rises to the top of the liquidV and Hows up through the open bottom of the channel 47 into .the latter and thence over wall 40 into the receiving chamber 472 Owing to the position and form of the escape opening 49 `(Fig. 9) in the wall 40, water below the normal water level may How off to the discharge 50, but the grease on top of the water in chamber 47 remains entrained and may be easily removed.

Having now described my invention, what bodying a casing having a sediment chamber y in its base, an inclined coverover said chamber provided with openings for the passage of sediment into said chamber, a. sewage receiving chamber on said cover arranged approximately centrally of said casing, a sinuous course or raceway in communication with said receiving chamber and extending continuously therefrom to the periphery of said casing, and means for feeding sewage to said receiving chamber.

3. An apparatus for treating sewage, embodying a casing having a sediment chamber in its base and its walls inclined above said sediment chamber, an inclined cover over said chamber and having its lower edges terminating nea-r the lower ends of said inclined walls, a sewage receiving chamber on said cover arranged approximately centrally of said casing, a sinuous course or raceway extending continuously yfrom said receiving chamber to the periphery of said casing, and means for feeding sewage to said receiving chamber. f

4. An apparatus for treating sewage, embodying al casing having a sediment chamber in its base, an inclined cover over said chamber, a plurality of curved vertical partitions on said cover, said partitions having formed the periphery of said casing, 4and means for 1 j feeding sewage tosaid sewage receiving chamber.

5. An apparatus for treatin sewage, embodying acasing having a se iment chamber in its base, an inclined cover over said chamber, brackets or pedestals carried by the walls of said casing, angle iron bars carried by the lower edges of said cover and connected to said pedestals to provide orifices through; which sediment may pass into said sediment chamber, a sewage receiving chamber on said cover arranged approximately centrally of said casing, a sinuous course or raceway extending continuously from said receiving chamber to the periphery of said sewage receiving chamber.

6. An apparatuslfor treating sewage, em-

bodying a casing having a sediment chambery in its base, an inclined cover over said chamber, means for rmly anchoring the cover to the vcasing leaving orifices between said cover and sald casing through which orifices sediment may pass into said chamy said cover arranged approximately lcentrally of said casing, a sinuous course or raceway extendmg continuously from sald sewage receiving chamber to' the periphery of said4 casing, means for feeding sewage to said sewage receiving chamber, and means forrecoverin'g fatty products from the sewage.

8. An apparatus for treatin sewage, embodying a casing having a se iment chamber 1n its base, a conicaly cover over said chamber, a sewage receiving chamber on .said cover arrangedv approximately centrally of said casing, a sinuous course or raceway extending continuousl from -said sewage receiving chamber to t e periphery of said casing, means for feeding sewage to said sewage receiving chamber, and means for recovering fatty products from the sewage, said last named means including a channel surrounding the outermost portlon of Vsaid course or raceway.

9. An apparatus for treatingl sewage, embodying a casing'having a sediment chamber in its base, a conical cover over said chamber, a sewage receiving chamber on said cover arranged approximately .centrally of said casing, a sinuous course or raceway extending continuously from said sewage receiving chamber to the periphery of said casing, means for feeding sewage to said sewage receiving chamber, and means for recovering fatty products from the sewage, said last named means including a collecting channel and receiving chamber surrounding said course or raceway and interposed between the same and the periphery of said casing. v

vl0. An apparatus for treating sewage, embodying a casing having a sediment chamber in its base, a conical cover over said chamber, a sewage receiving chamber on said cover arranged approximately centrally of said casing, a sinuous course or raceway extending continuously fromsaid sewa e receiving chamber to the periphery o said casing, means for feeding sewage to said 'sewage receiving chamber, `means. for recoveringl fatty products from the sewage, said last named means including a channel surrounding the outermost portion of said course or raceway, and means whereby fluid is permitted-to escape from said casing and fatty products floating on said iuid are re.

tained in said casing.

In testimony whereof I hereunto affix my signature in the presence of two witnesses.

EUGrEN SEUBERT. v Witnesses:

MATHmDE K. HELD,l JQHANNA STERN. 

